<?php
   /** 
    * File: SimpleImage.php * Author: Simon Jarvis * Copyright: 2006 Simon Jarvis * Date: 08/11/06 * Link: http://www.white-hat-web-design.co.uk/articles/php-image-resizing.php * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details: * http://www.gnu.org/licenses/gpl.html * */
class SimpleImage {
	var $image;
	var $image_type;
	function load($filename) {   $image_info = getimagesize($filename);
		$this -> image_type = $image_info[2];
		if ($this -> image_type == IMAGETYPE_JPEG) {   $this -> image = imagecreatefromjpeg($filename);
		} elseif ($this -> image_type == IMAGETYPE_GIF) {   $this -> image = imagecreatefromgif($filename);
		} elseif ($this -> image_type == IMAGETYPE_PNG) {   $this -> image = imagecreatefrompng($filename);
		}
	}
	function save($filename, $image_type = IMAGETYPE_JPEG, $compression = 75, $permissions = null) {
		if ($image_type == IMAGETYPE_JPEG) { imagejpeg($this -> image, $filename, $compression);
		} elseif ($image_type == IMAGETYPE_GIF) {   imagegif($this -> image, $filename);
		} elseif ($image_type == IMAGETYPE_PNG) {   imagepng($this -> image, $filename);
		}
		if ($permissions != null) {
			chmod($filename, $permissions);
		}
	}
	function output($image_type = IMAGETYPE_JPEG) {
		if ($image_type == IMAGETYPE_JPEG) { imagejpeg($this -> image);
		} elseif ($image_type == IMAGETYPE_GIF) {   imagegif($this -> image);
		} elseif ($image_type == IMAGETYPE_PNG) {   imagepng($this -> image);
		}
	}
	function getWidth() {
		return imagesx($this -> image);
	}
	function getHeight() {
		return imagesy($this -> image);
	}
	function resizeToHeight($height) {   $ratio = $height / $this -> getHeight();
		$width = $this -> getWidth() * $ratio;
		$this -> resize($width, $height);
	}
	function resizeToWidth($width) { $ratio = $width / $this -> getWidth();
		$height = $this -> getheight() * $ratio;
		$this -> resize($width, $height);
	}
	function scale($scale) { $width = $this -> getWidth() * $scale / 100;
		$height = $this -> getheight() * $scale / 100;
		$this -> resize($width, $height);
	}
	function resize($width, $height) { $new_image = imagecreatetruecolor($width, $height);
		imagecopyresampled($new_image, $this -> image, 0, 0, 0, 0, $width, $height, $this -> getWidth(), $this -> getHeight());
		$this -> image = $new_image;
	}

}
?>